The most popular standalone chat platform on Android, WhatsApp, has been updated with a whole new look - and it's holo-y. About a month ago, WhatsApp previewed its redesigned aesthetic in a beta release, and now those changes have made their way into the release client. While the changelog is pretty sparse on details ('update user interface to the latest android look and feel'), compared to the old version of the app, the visual differences should be fairly obvious.